Device for hardening the surfaces of cylindrical bodies



F. KLOPP 1,879,850

DEVICE FOR HARDENING THE SURFACES OF CYLINDRICAL BODIES Sept. 27, 1932.

Filed March 5. 1931 V as Patented Sept. 27, 1932 UNITED STATES FRIEDRICH KLOPY, OF WALD, RHINELAND, GERMANY DEVICE FOR HABDENING THE SURFACES OF CYLINDRICAL BODIES Application filed March 5, 1931, Serial No.

It is known to harden the surface of cylindrical bodies, such as pistons, shafts, running wheels and the like and by means such that the bodies to be hardened, rotating between burners, are brought to the hardening temperature only on their surface and then cooled in a hardening liquid under the burners.

This invention relates to a device for carrying out this method and consists of an apparatus, by means of which the bodies to be hardened are rotated between the burners by being placed on shafts provided with fi'utes and rotating in known manner. The feed to these shafts consists of a known inclined track, from which the bodies to be hardened roll successively and automatically. The invention consists further in that thebodies heated all round on the surface come into the quenching liquid by ejection from the shafts by a reciprocating piston, are dropped into the quenching liquid by the moving apart of the shafts. The rotating shafts might also be immersed so far in the quenching liquid, that the bodies to be hardened lie in known manner partly in the quenching liquid. In this instance the bodies are not heated all round, but only above the the cooling liquid and immediately cooled thereafter in known manner.

An embodiment of the invention is illustrated by way of example in the accompanying drawing in which:

Fig. 1 is a top plan view of the apparatus.

Fig. 2 is an end view of Fig. 1.

Fi 3 shows a section on line 22 of Fig. 1 and Fig. 4 is a section on line '33 of Fig. 1.

An axle o is journaled in bearings a, a of a frame 6 and an axle eis ournaled, at right angles to and above the axle a, in bearings 03, d of the frame I). A driving-pulley f is arranged on the front end of the axle 0, a worm wheel g between the bearings d, d and a toothed wheel 72. on the rear end of this axle. A worm wheel 2' keyed on the axle e meshes with the worm wheel journaled in the head is of the frame 6 and fluted each on its projecting unsupported front end. A toothed wheel m is keyed on the rear end of each of the shafts Z, Z. These 9. Two shafts Z, Z are 520,448, and in Germany March 7, 1980.

toothed wheels m mesh with an intermediate wheel 72. mounted on the frame 5 and meshing with the toothed wheel k. A piston 0 is guided in the head 7: of the frame 5, a roller p on this piston 0 bearing against a cam '1" on the axle e. The bodies u to be hardened, which inthis instance are assumed to be cylinder pistons, are placed on an inclined chute 8. Burners t are arranged above the fluted .ends of shafts Z, Z. Under the shafts Z, Z the so hardening liquid is arranged.

For driving the device the axle 0 and thence the axle c with the cam 1' are rotated. The bodies u rolling down the inclined chute s on to the shafts, Z, Z are likewise rotated by the flutes provided in the shafts Z, Z and consecutively adjusted on the shafts Z, Z between the burners t by means of the piston 0. In this position they are heated all round and during the following stroke of the piston 0 ejecte from the shafts Z, Z into the hardening liquid situated thereunder. A

I claim:

1. An apparatus for hardening the surface of cylindrical bodies, comprising in combination a quenching tank, parallel rotatable fluted shafts journalled at one end. in the wall of said tank above the surface of the quenching liquid and projecting over part of the width of the tank adapted to support and retate the bodies to be hardened, a chute above Y the journalled end of said shafts adapted to successively feed the bodies to be hardened to said shafts by gravity, burners arranged above the free end of said shafts and means for periodically shifting the bodies on said shafts a distance equal to the width of one body in the longitudinal direction of said shafts so that the body last delivered by said chute is shifted from thereunder toward said burners thus making room for the next following body and pushing the first body still supported on said shafts between said burn-' ers off thefree ends of shafts into the quenching liquid. V

2. An apparatus as specified in claim 1, comprising in combination with the parallel shafts and the tank, a shifting means which includes a piston mounted in the side wall of said tank shiftable in longitudinal direction t parallel to saidshafts, and a cam at the outer end of said piston adapted to impart a reciprocating movement to said piston to efiect the feeding of the bodies along said shafts and to push the body actually on the free end of said shafts off said shafts so that it drops into the quenching liquid in said tank.

In testimony whereof I afiix my signature.

FRIEDRICH KLOPP. 

